raise hood it is located driver side and mounted on the fender(wing)--- I unscrewed plug and removed unit--- then with a hard pull it pulls out the base ---cleaned pins placed a small shim in the top and put plug together and rescrewed it in the diagnostic ---worked perfect----Tex Bill\while it wont make your car run any better and is it really needed on an automatic---as it is there it might as well work ---this was why I was looking to do it myself---thanks for all the help and interest----I have other questions to ask and I'm sure the response will be as good